Document and Entity Information Document and Entity Information	3 Months Ended
	Jun. 30, 2012	Jul. 31, 2012
Document and Entity Information
Entity Registrant Name	VALERO ENERGY CORP/TX
Entity Central Index Key	0001035002
Document Type	10-Q
Document Period End Date	Jun. 30, 2012
Amendment Flag	false
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		551,605,943